/Engine/Source/Editor/UnrealEd/Public/FbxImporter.h
This function show a dialog to let the user resolve the material conflict that arise when re-importing a mesh
template<typename TMaterialType> static void ShowFbxMaterialConflictWindow ( const [TArray](API\Runtime\Core\Containers\TArray)< TMaterialType > & InSourceMaterials, const [TArray](API\Runtime\Core\Containers\TArray)< TMaterialType > & InResultMaterials, [TArray](API\Runtime\Core\Containers\TArray)< int32 > & RemapMaterials, [TArray](API\Runtime\Core\Containers\TArray)< bool > & FuzzyRemapMaterials, [EFBXReimportDialogReturnOption](API\Editor\UnrealEd\UnFbx__EFBXReimportDialogReturnO-) & OutReturnOption, bool bIsPreviewConflict )